Lacquered Stainless Steel Knobs, Sturdy and will not get dirty easily. SIZE: Cover Size: 65mm(2-3/5"), Knob diameter: 53mm(2") ADJUSTABLE LATCH - 60mm(2-3/8") or 70mm (2-3/4"); Fit all doors 35 to 45 mm ( 1-3/8" to 1-3/4")thickness; Notice: The latch plate is not removable. FUNCTION - Fits both right handed and left handed doors; Installed on interior door, suit for bathroom, kitchen, bedroom, Children's room. Keyless locks(without keys), which means you can use turn buttons from inside., you can use a coin to open from exterior if emergency. EASY INTALL: Locks in Probrico is portable and durable, they are gorgeous and sleek, you do not need to lubricate. Installation is a breeze. We have installation instruction in our package. SERVICEAll products has 3 year warranty, contact us anytime if you have question, we will reply all message within 24 hours. If any problem occurs in the product, please contact, we will send you a replacement absolutely fr